Junction-box.



'Patented July 4,1911

M. J. MYERS. JUNCTION BOX. APPLICATION FILED Nov. 26,1997. RBNBWBD APR. 29, 1911.

J UN CTION-BOX.

996,376, speomcauon of Letters ment. Patented July 4, 1911, Application led November 26, 1907, Serial No. 408,934. Renewed April 29, l1911. Serial No. 624,454.

To aZZ whom it may concern:

Be it known that I, MA'rrHEw Jnnvrs MYERS, of ,Syracusein the county of Onondaga, in the State of New York, have invented new and useful Im'prove'ments in Junction-Boxes, of vwhich thefollowing, taken in connection with lthe accompanying drawings, is a' full, clear, and exact description. This invention relatesto certain improve! openings, that is tomold the closures in the openings in suchmanner readily disinte ated or detached from the maln body of t e cap. In order to do this, the closures are made of fragile material held inplace at their meeting edges b a thin web forming the outer finishing surfsace of the cap. p

My special object, therefore, join the closures in their respective openings t to the main body of the cap by thin webs of walls or ceiling of a room where these conductors are usually brought together for connection with somefelectrical fixture or translating device andfmay also be utilized lfor the reception of fuse wires, lightning arresters and similar connections in the electric circuit. p

In the installationfof a system of wiring the electric conductors branching oli' to different parts of the building are usually passed throughy suitable pipes or housings of fire proof material leading to the portion of the wall or ceiling where it is desired to provide attachments for suitable fixtures.

hese junction boxes are usually secured in 'the proper position inthe walls or ceiling during the course of construction with one side exposed to the interior of the room so that the plaster may be finished against the sides and ends of the box and in View of-the factl that the electricconductors'are frequently brought to the box from different direct-ions, of such box are 9 more normally closures place'so that only such be necessary to accommodate what branch conductors may be connected to the fixture.

Other objects and uses in the following description.

In the drawings-Figure l is View of permanently in are respectively longitudinal and transverse sectional view through the ,box seen n Fig. l. Fig. 4 is alongitudinal sectional view of the porcelain cap seen inv Figs. l, 2 and 3 showing all of the closures in their orlgmal position as molded with the cap. Flg. 5 is a perspective view of the det-ached box omitting the cap.

In order to demonstrate the practicability o f my Ainvention II have shown a substantlally rectangular box -1- having its bottom, sides and ends provided with openings `2` in which are more or lesstightly fitted disk closures -3- capable of being readily removed under slight pressure but normally self-retained by friction with the sides of the opening. This 'box together with the disk closures -3 maybe made of metal or any other suitable lire proof material and form or size capable may also be of any of belng secured in the wall or ceiling of a t e back, sides and ends cach provided with one o closed openings, either of which may be readily opened at will to receive the entering wire nearest thereto, the remaining openings being left closed to protect the walls or ceilings from exposure to electric sparks or arcs from short circuits which may occur within the box. t

The cap or cover for the open side of thel box is .preferably made of porcelainbr other suitable insulating material for the purpose of giving a neat finish to the side of the box exposed to the interior of the room. These caps or covers are usually provided with an indefinite number of o enings or outlets for the branch wires leading to the fixtures or translating devices and one of the main ob'- jects of my present invention is to rovide such caps with integral closures or the building. I ractice the bottom' of the box-l'- is mg screws or other suitable fastening means, not shown, by which the I*box may be secured to the studding or lath with its open side facing the interior of the room and substantially flush with the plaster. v

he open side of the' box is covered by a that they may be will be brought outl are removed as mayy provi ed with screw holes 4.- for receivthin web able instrument without leaving objectionporcelain or other in- Sula-ting material 'capa le of giving a pleas ing external appearance, said cap being provided with a plurality of, in this instance, three apertures 6 which are normally closed bycomparatively thin diaphragms or partitions -7-` usually of the same material and molded integral with the cap when the latter is formed.

The edges of the closures or diaphragms -7- where they ,are joined to the main body of the cap are preferably very thin and fragile so that the diaphragms may be readily disintegrated lor displaced under slight pressure or a light blow with a suit? ings .--6-` in the cap, the remaining openings -6 being left closed. j

This cap maybe secured to the open side of the box by any suitable fastening means as screws -10-- whichare passed through apertures in diagonal corners of the cap and enga ed with threaded apertures in correspon ing corners of the box.

The principal feature of my invention consists in provlding openings and with a corresponding number of integral comparatively thin diaphragms or closures for said opening, said closures bein lunited to the main body of the cap by t in Webs of fragile material capable of being broken under light pressure so that one or more'of ,the closures may be disintegrated-to permit a corresponding number of wires to be drawn through the corresponding o enings.

What I c aim 1s: l

A junction box having a body portion and a cap therefor of insulating materialprovided with a plurality of openings, each of the openings, said closures interposed between and connected to the walls of the openings by a comparatively thin web of fragile material, said closures positioned approximately centrally of the openings, and a thin' veneer of glaze covering the outer surface of the cap that portion of the walls of the openings a ove the closures and the outer surface of the closures, said veneer kat the sides of the cap being flush with the outer face of the body portion of the box.

In Witness whereof I have hereunto set my hand this 18th day of llovember 1907.

able ragged edges around the sides of the opening. In practice I have found it convenient to retain these diaphragms or. clo sures 7 in position by a thin veneering -8- of glaze which not only covers the outer surface of the cap but also covers the surface of the closures -7- and forms a junction at the edges of said closures with the main body of the cap to hold the latter in position and at the same time affords a of fragile and easily breakable material capable of being disintegrated under light pressure to afford a passage entirely through one or more of the openings through which it may be desired to pass one or more of the electrical conductors.

The main wiresl are brought through one or more of the openings -2 by removing thenecessary closure or closures 3 leaving the remainin lclosures intact thereby affording practica ly a closed box inclosing the junction of J'. MYERS.

the wires while the wires which are attached to the fixtures in the Witnesses: room .are brought out from the interior of MILDRED M. No'r'r,

the box through one or more of the open- CAROLINE M. MCCORMACK.

a closure for the cap with one or more 

